Re: [PATCH 2/2] i2c: designware: slave should do WRITE_REQUESTED before WRITE_RECEIVED

[Wolfram Sang]

Hi Michael,

> Documentation/i2c/slave-interface.rst says that I2C_SLAVE_WRITE_REQUESTED,
> which is mandatory, should be sent while the data did not arrive yet. It
> means in a write-request I2C_SLAVE_WRITE_REQUESTED should be reported
> before any I2C_SLAVE_WRITE_RECEIVED.

Correct.

> dev->status can be used to record the current state, especially Designware
> I2C controller has no interrupts to identify a write-request. This patch

Just double-checking: the designware HW does not raise an interrupt when
its own address + RW bit has been received?

Kind regards,

   Wolfram

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